We are building a third-party tool to do exactly this. We’d be happy to talk through your particular import details and have you try out our tool to make sure it meets your needs - please feel free to direct message me if you’re interested!

We are building a third-party tool to do exactly this. It will check for existing contacts you have, and allow you to choose if you want to update specific fields on those records or just ignore and simply import only new contacts. If you’re interested in trying this out, feel free to direct message me and I’d be happy to walk through your specific needs to make sure it’s a good fit!

Hi @kevin, I've actually merged your previous idea ("Import contacts, ignoring any already in HubSpot") because the two are intrinsically related, and if a solution for one of these were to be implemented, it would likely also address the other. Combining these two ideas will increase the chance of other users finding and upvoting the same one, which will increase its visibility. Please let me know if you have any questions!

This is a great idea. I'm just trying to combine data bases into a single Hubspot CRM, and I've already installed my most current data. (It's a shame I didn't do oldest to newest - that would have been a good tip.) @ashley_milne: is your tool ready to test? I'd be happy to give it a go if so, as I'm not too far along in my configuration of Hubspot.